01588cam a2200277 4500 gs 67000307 DLC 20260227111421.0 690702s1968 dcuab b 00000 eng c gs 67000307 //r883 U.S. Geological Survey. Library n-us-sd n-us-wy QE75 .P9 no. 297 Geological Survey (U.S.) Pegmatites and other Precambrian rocks in the southern Black Hills. [Washington, U.S. Govt. Print. Off., 1968] 408 p. illus., maps. 30 cm. Professional paper 297 Published originally as separate chapters A-F. Includes bibliographies. A. Geology and beryl deposits of the Peerless pegmatite, Pennington County, South Dakota, by D. M. Sheridan and others.--B. Geology of the Hugo pegmatite, Keystone, South Dakota, by J. J. Norton, L. R. Page, and D. A. Brobst.--C. Exploration for beryllium at the Helen Beryl, Elkhorn and Tin Mountain pegmatites, Custer County, South Dakota, by M. H. Staatz and others.--D. Geology and pegmatites of the Fourmile quadrangle, Black Hills, South Dakota, by J. A. Redden.--E. Geology and mineral deposits of some pegmatites in the southern Black Hills, South Dakota, by J. J. Norton and others.--F. Geology of the Berne quadrangle, Black Hills, South Dakota, by J. A. Redden. Pegmatites. Geology Black Hills (S.D. and Wyo.) Geology, Stratigraphic Precambrian. Geological Survey professional paper ; 297. 30388 30388